How social difference lead to social division?

Every social difference does not lead to social division. Social differences divide similar people from one another, but they also unite very different people. People belonging to different social groups share differences and similarities cutting across the boundaries of their groups. In the instance above, Carlos and Smith were similar in one way (both were African-American) and thus different from Norman who was white. But they were also all similar in other ways – they were all athletes who stood against racial discrimination. It is fairly common for people belonging to the same religion to feel that they do not belong to the same community, because their caste or sect is very different. It is also possible for people from different religions to have the same caste and feel close to each other. Rich and poor persons from the same family often do not keep close relations with each other for they feel they are very different.